Recognised as Physical constant
Astronomical unit
- au
- Exact by definition
- astronomical
Astronomical unit (au) is 149,597,870,700 m. Exact by definition since 2012, and roughly the distance from the Earth to the Sun. Values follow CODATA 2018 (2019 SI redefinition).
Value
Value149,597,870,700 m
Scientific notation1.495978707 × 10^11 m
Unitm
Symbolau
ExactnessExact by definitionExact by definition since 2012, and roughly the distance from the Earth to the Sun.
Reciprocal6.684587122 × 10^-12
Order of magnitude10^11
Multiples
× 22.99195741 × 10^11
× 101.49597871 × 10^12
× 1001.49597871 × 10^13
× 1,0001.49597871 × 10^14
× 0.57.47989354 × 10^10
× 0.11.49597871 × 10^10
Provenance
DatasetCODATA 2018 (2019 SI redefinition)
Categoryastronomical
Why it mattersExact by definition since 2012, and roughly the distance from the Earth to the Sun.
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